Mechanical drive



Jan.5, 1932. w. J. DRUCKER MECHANICAL DRI VE Filed Nov. 18, 1929 2Sheets-Sheet In vena# l lill Jan- 5, 1932. w. J. DRUCKER MECHANIGAL.DRIVE Filed Nov. 18, 1929 z sheets-sheet 2 www Patented Jan. 5, 1932UNiTn sTArEs PATEN-Tforfw WILLIAMJ. nnucxnaor ri:t13ni\ir,` nnWYonK vnnotiertICAI. naive Application led November 18, 1929. Serial No.407,959;

The invention relates to a mechanical drive whosetorsional ypower forthe drivef, shaft is derived through the winding of elasf tici` skeinsmade of' rubber strands. v5* It is applicable-andv usefulin driving airpropellers for` model airplanes,-.gliders, toys and other applianceswhere a large number of revolutions for delivery of revolvablepowershould beharnessed by mechanical means.v -The invention is exemplifiedin the combi. nation and arrangements of. parts shown inf theaccompanying drawings andl described in the following specifications,and is more particularly pointed out in the appended claims.

'In the drawings:

.Figure 1 is a longitudinal planlviewI of the sembly and parts.

device, exhibiting `its principal length .as-.r

ly on the line 3-3 in Figure l1.@

v- Figure 4 is a left end Vview of the device as seen in Figure 1.-' i

T,Figure 5 isa longitudinal modified form of theldevice.

F igureq is. actransverse section online 6.-6inFigure 5. 1

301in Figure.

in Figure 5.

Figure 9 is a right hand end-viewof the.

devicey as seen in Figure 5. -f l Figure 10 is afragm-entary view on'line 10.-f10 in Figure 5. f

Naturally the length ofthe` skein` is limited,

and' it is the objectl of -this invention toadoptv a plurality of skeinsrevolvablymountedyonboth their ends, alongside each other, to al'-lowlthe accumulation*of ak greater amount 50A `skeins used to beharnessed for delivery igure 2.is a transverse section substantial planview y of a l =Figure;7 is a transversesection on line 7 -7 l n j,manner v as previously described,` revolvably `8011' -Figure8 is atransverse section on line 8-8` of. revolutions according tothe numberofl the drive shaft. ,i ,K ln Figures 1, 2, 3 and/lthe frame plates 1 land 2 are mounted on rods 7 and 8. With the aid of spacing tubes' and 4'andl nuts 5 and; 55'? 6 the framefis rigidly mounted. The drive shaft 9revolvable in bearings 11` and 12 Ais provided withv a collar `thrust'ball bearing 13 and terminates yintoga hook 14. ,The skein of rubberstrands 15 iS .Secured yto' hookllwith one end, to r-evolvable hookV 16with the other.' The shaft 17 is revolvably mounted-2 in bearings 18 and19, provided with a collar thrust ball bearing 20 and 'gearj21rigidlygattached. This gear is engaged togear- 22, 65? which is inountedfin likemanner. as gear 20..- The shaft of gear 22 .terminates in a revolv-`able hook 27 saine as 14;` and 16. YTo this hook 27, issecured anotherskein ofrubber strands g 28'with its one end and secured withthe other7d "l end to a hook arranged on shaft32, tojournalthe rigidly mountedgear 54 in like man ner as the previously described hook and gear. VA

l arrangement: `Gear 34 isengaged to Lgeai Y rigidly journaled'on shaftterminatingin 75 hook. 37 To thishook is fastenedskein with oneend andto hook 39 with the other.

Aj. pair of hooks, shafts, collar thrust-ball bearings, and gears-arearranged for.v in like.

led upon shaft-'67.1 'A p'awl` .69 lis engagingthe-A ratchet wheel 68 asindicated to check the revolutions fof shaft 166 in one direction. Shaft'6 6 is of a square shape at its end as170 indicates,tol receive awindingv key 71 for the {NY-V purpose of'winding this mechanism.

It is understood by `this description that a pluralityof gear" setsandrevolvable shafts andr hooksl connecting a plurality ofskeins 'aremounted in :a manner thatwithwinding 95 key '71 'subjecting the firstyskein 65 to". wind-ff ing, the revolutions are partly imparted to., lskeinA 6a and'successivelyto thefresto'f the skeins, 63, 62, 61, 38,28,15by having part v. of fthe torsional' efect harnessed in the first'V109 skein transferred to the following skeins through the arrangement asdescribed.

As any one of the skeins are able to'absorb a given amount ofrevolutions for later de-V livery-say 200 each as a matter ofexample-the 8 skeins arranged for in this device could deliverabout8times 200 or 1600 revolutions on the drive shaft. So the-amount ofrevolutions which can be harnessed in this device increases with theincreasing number of skeins provided for. The torsional power.

is finally checked at the end of skein 15 at ,hook 14 leading into shaft9. It is understood that the torsional power at this point can bereleased by a suitable arrangement according to the construction 'ofapparatus for Y which this mechanical drive is to serve. Rods 7 and' 8arevr arranged in this drawing by way of=illustration-` They might notbe needed in `instances -where it is desirable to mount the leftframewith a plurality of gear sets opposite theright'frame as in Figure 1,"inan ap paratus, where the insertion of these two frames might be moreadvantageously effected without these rods.- V- Y. f

VIt is understood that this mechanical drive,

i delivering as many revolutions as mentioned with a suiicient torsionaleffect, depends for its-principal means of torsion harnessing andtransferring material on rubber o-r material of similar or betterelastic vivacity and.'

stretching resiliency.y Y

TheY application of `gears las a means of transferring revolutionsfrom'one skein to thevothe'r skeins can also be effected by belt engagedpulleys instead'of the teeth engaged gears, and I do not wish to belimited to the gear means' solely for this invention. The application'ofpulleys in place of gears being within the ordinaryrniechanical skill. y

Furthermore, the winding Aarrangement with key 71 can be enhanced byadding a gear andpinion or other suitable means to increase the ratio ofwinding revolutions on shaft 66 in winding'key 71 accordi-ngto the bestadaptable method for the apparatus, for which this mechanical drive isto serve. yFigures 5, 6, 7, 8, 9 and 10 show a modified form of means-tofh'arness a larger number of' revolutions by the adoptionof aplurality of skeins, to'be wound respectively to unwind simultaneously.f

- T'ohooks 127, 128,129 and 130 rigidly secured by rivet heads 127A,128A,129A and 130A to plate 82 are connected skeins 124, 125, 126, and127 -at'one end, and tohooks 120, 121, 122 and 123 at the other. Thesehooks are attached to shafts 113, 1.14, 115 and 116 journaled' in plate81 with the thrust ball bearingsrasl outlined vin Figure 1. Four gears,

f 105,106, 107 and-108 are rigidly mounted on the four shafts 113, 114,115, 116, which gears are all secured to gear 109 rigidly mounted onshaft 99 journaled in frame lplates 80 and 81. On shaft 99 isfurthermore 4rigidly secured a as at 118.

ratchet wheel 103. A pawl 104 secured as at 104a to gear 98 revolvablymounted upon shaft 99 checks the revolutions of gear 98 in onedirection. Gear 98 is engaged to a pinion `97 rigidly mounted on shaft94 which shaft furthermore accommodates rigidly mounted gear 93 toengage pinion' 92 rigidly mounted on the revolvable `drive shaft 87journaled as at 88 and 89.

The procedure forl harnessing a large v'number of revolutions in thisdevice for delivery at the drive shaft 87 is as follows:

YKey 119 engages shaft 99 at its square end On shaft-99 Journaled inframe plates 88, and 81, ismounted gear 98 with pawl 104, ratchet wheel103and gear 109 in a manner as before outlined.' It is under-V stoodthat of all the gears applied onlyv gear* 98, to which is fastened pawl68, is not rigidly mounted upon its shaft but revolvable. In winding key119 pawl 104 rides over the teeth of ratchet wheel 103leaving gear .98and thereto engaged pinion 97 as well as gear 93 and pinion 92 towardsand including theV drive shaft 87 stationary (this phase of functionwill be enhanced Vby a suitable checking arrangementon the drive shaft87 accordingv to best advantage suitable for the device for which thisinvention is to serve). The rigidly mounted gear 109 revolvessimultaneously the four gears 105, 106, 107 and 108 with their shaftsand hooks to which are secured the four skeins. The skeins retain thetorsional eect imparted to them in winding shaft 99 with key 119 or byother suitable winding means, and this .accumulated *torsional power inthe-skeins to be released with the releaseV of shaft 81 for' revolvablemotions. The four gears 105, 106,107 and 108 engaging gear 109 andincluding same being all of the same pitch diameter and having selectedgears and pinions, 98, 97 and 93, 92l of a ratio 1 to 4, revolutionscan-be imparted to the drive shaft 87 to theamount of 3200 if the key119 respecting the skeins are wound only 200-times.` Of course, aplurality of skeins as well as gears and pinions can-be applied to varythe amount of revolutions obtainable at the'drive shaft vin conjunctionwith the force of power needed.

It Will be evident that various mechanical features equivalent to thosenoted couldv be such skeins secured one each with one end to a pluralityof stationary hooks and with the other end to revolvable hooks andshafts mounted in a frame, Windingl means in said frame adapted tosimultaneously Wind said skeins producing a torsional power, gearingarrangement in said frame adapted for the delivery of said torsionalpower, in increasing revolutions to a revolvable drive shaft.

2. In combination a frame, a drive shaft journaled in said frame,gearing in said frame, Winding arrangement in said frame, a plurality ofrubber skeins each revolvably secured on one end and stationary on theother, said skeins adapted to impart a number of revolutions as atorsional power upon said gearing secured to said drive shaft.

3. A plurality of elastic, iiexible and stretching skeins, stationarilymounted at their one end, revolvably mounted at their other end each bymeans of a journaling ,Y

shaft and gear, a plurality ofsuch gears engaged to a common single gearand shaft for the purpose of simultaneously imparting previouslyharnessedtorsional revolutions in said skeins to said common gear andshaft.

WUJLIAM J. DRUCKER, y l

